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Flames from a flaring pit near a well in the Bakken Oil Field. The primary component of natural gas is methane, which is odorless when it comes directly out of the gas well. In addition to methane, natural gas typically contains other hydrocarbons such as ethane, propane, butane, and pentanes.

The Supreme Court on Friday left in place Biden administration regulations aimed at curbing oil and gas facility emissions of methane, a major contributor to climate change.

In a separate action, the court also rejected a bid to block a separate regulation aimed at curbing emissions of mercury and other toxic pollutants from coal-fired power plants.

In both cases, the court rejected emergency applications without comment, with no noted dissents. Litigation will continue in lower courts.

A separate emergency application seeking to block Biden regulations concerning greenhouse gas emissions from coal- and gas-fired power plants remains pending.

The court's decision in the methane case means that an Environmental Protection Agency regulation that was finalized in March and is intended to cut methane emissions by up to 80 percent over the next 14 years will remain in effect.

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